Plenty Surprisingly very well. If i'm honest, I was feeling left out when OH got his itaste 134 haha. And i saw it on sale for £45 with two generic ce4s so i asked for a fiver off if i didn't have the ce4s and he said yes.
No idea if they can be bought cheaper but here is where i got mine.
I didn't expect it to be as good as it is. I love the batteries, I'm going to buy some more. I don't stack them so i basically have two 900mah batteries to rotate. OH was surprised with it too. It took me about 5 minutes to figure out the controls and away i went! And ive had various tanks on it (Iclear 30, 30b, 16 and a mini protank) on it and they all work well with it.
I have seen some very nicely priced innokin stuff today, OH had some up earlier. My e-pack has coolfire 2 at 40 quid.
Not sure if the coolfire 2 uses removable batteries though.
Obviously the plus side is you only need one charger though so even though you buy that separately on mods like the vamo and the itaste its not a repeated expense, once you've got a charger and a couple of types of batteries you're only paying for a mod next time and the chargers fit various types of batteries (For example my charger charges OHs itastes battery aswell, and vice versa, even though my batteries dont fit into the itaste 134 because theyre too fat).